Coating composition comprising fluorochemical polyether silane polycondensate and use thereof
Assignee3M Innovative Properties Company
InventorsGeorge G. I. Moore, Rudolf J. Dams, Franceska M. Fieuws, Guido P. Piessens
Life of this patent
Estimating the term…
Abstract
A composition comprising the condensation product of a least one fluorochemical polyether silane compound having a polyfluoropolyether segment and at least two hydrolysable silane groups per molecule, with one or more non-fluorinated compounds having at least two hydrolysable groups per molecule, and the reaction product thereof, is disclosed. The composition provides durable water, oil and stain repellency to a substrate.
Claims14
A composition comprising the reaction product obtainable after a substantially complete condensation reaction of:
- (A) at least one fluorochemical polyether silane compound the formula:
- Rf—[Q—CR2—Si(Y)3−x(R1)x]z
- wherein Rf represents a multivalent polyfluoropolyether segment, Q represents an organic divalent linking group, R1 represents a C1-C8 alkyl group, Y represents a hydrolysable group, R represents hydrogen or an alkyl group of 1 to 4 carbon atoms whereby the R groups may be the same or different, z is 2, 3 or 4 and x is 0 or 1;
- and
- (B) a substantial amount of one or more non-fluorinated compounds of an element M selected from the group consisting of Si, Ti, Zr, B, Al, Ge, V, Pb, Sn and Zn and having at least two hydrolysable groups per molecule;
- wherein the hydrolysable groups in components (A) and (B) may be the same or different and are independently selected from a halide group, an alkoxy group, an acyloxy group, an aryloxy group or a polyoxyalkylene group.
A process for the preparation of a perfluoropolyether condensation product, the process comprising the steps of admixing components:
- (A) at least one fluorochemical polyether silane compound the formula:
- Rf—[Q—CR2—Si(Y)3−x(R1)x]z
- wherein Rf represents a multivalent polyfluoropolyether segment, Q represents an organic divalent linking group, R1 represents a C1-C8 alkyl group, Y represents a hydrolysable group, R represents hydrogen or an alkyl group of 1 to 4 carbon atoms whereby the R groups may be the same or different, z is 2, 3 or 4 and x is 0 or 1;
- (B) a substantial amount of one or more non-fluorinated compounds of an element M selected from the group consisting of Si, Ti, Zr, B, Al, Ge, V, Pb, Sn and Zn and having at least two hydrolysable groups per molecule;
- and optionally
- (C) a crosslinking agent that is a compound of an element M1 that is selected from the group consisting of Si, Ti, Zr, B, Al, Ge, V, Pb, Sn and Zn, said crosslinking agent
- (C) further having at least one hydrolysable group and at least one reactive functional group per molecule that is capable of engaging in a crosslinking reaction,
- wherein the hydrolysable groups in components (A) and (B) and (C) may be the same or different and are independently selected from a halide group, an alkoxy group, an acyloxy group, an aryloxy group or a polyoxyalkylene group;
- and reacting the components until substantial completion of the reaction is detected.
Dependencies are inferred from the claim text.